<%@ page contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
<!DOCTYPE html>
<html>
<head>
    <title>book</title>
</head>
<body>
    <div style="text-align: center">
        <a href="opera?op=1">list</a><br>
        <a href="query.jsp">query</a><br>
        <a href="add.jsp">add</a><br>
        <a href="delete.jsp">delete</a><br>
        <a href=""></a><br>
    </div>
</body>
</html>